Joomla 2.5 - component fatal error [duplicate] - joomla2.5

Question

This question already exists:
imade a simple component aboutus with table contactus when i click on publish/unpublish get this errore
Closed 7 years ago.
When I make component in Joomla 2.5 I had this error:
Fatal error: Call to a member function reset() on a non-object in
/var/www/html/joomla/libraries/joomla/application/component/modeladmin.php
on line 850

Answer 1

I found‌ :when click on publish or unpublish first run this controller quite in my project this name is :
notic:run first this file
com_contactus/controllers/categories.php
<?php
defined( '_JEXEC' ) or die();
jimport ('joomla.application.component.controlleradmin');
echo "run first this file ";
class contactusControllerCategories extends JControllerAdmin
{
public function getModel($name='Category',$prefix='contactusModel',$config=array('ignore_request'=>true))
{
$model = parent::getModel($name,$prefix,$config);
return $model;
}
}
after run that Top file rund this file Of course gettable method
com_contactus/models/category.php
<?php
defined( '_JEXEC' ) or die();
jimport ('joomla.application.component.modeladmin');
class contactusModelCategory extends JModelAdmin
{
public function getTable($type='Category',$prefix='contactusTable',$config=array())
{
echo "second ";
return JTable::getInstance ($type,$prefix,$config);
}
protected function loadFormData()
{
$data = JFactory::getApplication()->getUserState('com_contactus.edit.category.data',array());
if (empty($data))
{
$data = $this->getItem();
}
return $data;
}
function getForm($data=array(),$loadData=true)
{
$form = $this->loadForm('com_contactus.category','Category',array('control'=>'jform' , 'load_data'=>$loadData));
return $form;
}
}
after that run towice files rund this file for run
com_contactus/tables/category.php
<?php
defined( '_JEXEC' ) or die();
jimport ('joomla.database.table');
echo "three ";
die();
class contactusTableCategory extends JTable
{
public function __construct (&$db)
{
parent::__construct('#__contactus','id',$db);
}
}
one of my wrong:
. I put the wrong tabels instead tables name in project